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[PHP] pobierz, plaintext 
<?php
$subject = "abcdef";
$pattern = '/^def/';
preg_match($pattern, $subject, $matches, PREG_OFFSET_CAPTURE, 3);
print_r($matches);
?>
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
$wzorzec = '/[a-zA-Z0-9.\-_]+@[a-zA-Z0-9\-.]+\.[a-zA-Z]{2,4}/';
preg_match_all($wzorzec, $tekst, $wyniki);
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
    <?php
 
      $subject = "abcdef";
 
      $wzorzec = '/[a-zA-Z0-9.\-_]+@[a-zA-Z0-9\-.]+\.[a-zA-Z]{2,4}/';
 
      $wynik = preg_match($wzorzec);
 
      ?>
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
<?php
if(!filter_var("someone@example....com", FILTER_VALIDATE_EMAIL))
 {
 echo("E-mail is not valid");
 }
else
 {
 echo("E-mail is valid");
 }
?> 
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
"someone@example....com"
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
$_POST['emai']
[PHP] pobierz, plaintext